function mouseOver(id)
        {               
            document.getElementById(id).className ='over_menu';
        }

        function mouseOut(id)
        {
            document.getElementById(id).className ='';
        }  
        function setClassValue(select_id)
        {
            //alert("click here:" + select_id);
            if(select_id.id.indexOf("id")!=-1) {
                //$("li.on").attr("class",""); 
                setClassOff();
                return true;
            }
            setClassOff();
            //$("li.on").attr("class",""); 
            //$(select_id).attr("class","on");
            document.getElementById(select_id.id).className = "on";
   
       } 
       function setClassOff()
       {
            for ( var i = 1 ; i < 8 ; i++ )
            {
                document.getElementById("menu_item"+i).className = "";
            }
       }
       function setClassOn(i)
       {
            document.getElementById("menu_item"+i).className = "on";
       }